CAT Preparation (Quantitative Aptitude)
Quantitative Aptitude section for CAT is all about right selection, fundamental knowledge and common sense. This section draws upon theory learnt in school up to the 12th grade, so let us come together and revive the same by brushing up the concepts thereby helping CAT aspirants to score well.
Pra
1.1K Views|Posted 2013-05-29 17:45:12
Started by Aru Chopra
40 Comments
Commented by
2013-09-10 16:32:58
@||Pynmanbait Nongtdu|| As you are an MBA aspirant, you may want to practice more. So I would request you to participate here by sharing and learning.
Solve square of 4029
Upvote 
Commented by
2013-09-05 16:44:27
@||tejal85419|| Based on the above the tricks, try to find out the square of 6008
Upvote Commented by
2013-09-03 17:46:44
*Squaring numbers between 7000 and 7099
1. Chose a number between 7000 and 7099
2. The first two digits are 490 _ _
3. The next two digits will be 14 times the last two digits.
4. The last three places will be the square of the last two digits.
ex-
1. 7004
2. 490 _ _
3. 14*04= 56
4. 04*04= 01
Upvote Commented by
2013-09-02 16:20:12
*Squaring numbers between 6000 and 6099
1. Chose a number between 6000 and 6099
2. The first two digits are 360 _ _
3. The next two digits will be 12 times the last two digits.
4. The last three places will be the square of the last two digits.
ex-
1. 6004
2. 360 _ _
3. 12*04= 48
4. 04*04= 016
Upvote Commented by
2013-08-28 17:13:10
*Squaring numbers between 5000 and 5099
1. Chose a number between 5000 and 5099
2. The first two digits are 250 _ _
3. The next two digits will be 10 times the last two digits.
4. 4. The last three places will be the square of the last two digits.
ex-
1. 5004
2. 250 _ _
3. 10*04= 40
4. 04*04=
Upvote Commented by
2013-08-26 15:08:57
*Squaring numbers between 4000 and 4099
1. Chose a number between 4000 and 4099
2. The first two digits are 160 _ _
3. The next two digits will be 8 times the last two digits.
4. The last three places will be the square of the last two digits.
ex-
1. 4005
2. 160 _ _
3. 8*05= 40
4. 05*05= 025
Upvote Commented by
2013-08-22 16:04:03
*Squaring numbers between 3000 and 3099
1. Chose a number between 3000 and 3099
2. The first two digits are 9, 0 _ _
3. The next two digits will be 6 times the last two digits.
4. The last three places will be the square of the last two digits.
ex-
1. 3004
2. 9, 0 _ _
3. 6*04= 24
4. 04*04= 0
Upvote Commented by
2013-08-16 11:38:06
*Squaring numbers between 2000 and 2099
1. Chose a number between 2000 and 2099
2. The first two digits are 4, 0 _ _
3. The next two digits will be 4 times the last two digits.
4. The last three places will be the square of the last two digits.
ex-
1. 2003
2. 4, 0 _ _
3. 4*03= 12
4. 03*03= 009
Upvote Commented by
2013-08-13 15:55:52
*Squaring numbers between 1000 and 1100
1. Chose a number between 1000 and 1100
2. The first two digits are 1, 0 _ _
3. Subtract 1000 from the number to get the difference
4. Multiply the difference by 2
5. Square the difference
ex-
1. 1007
2. 1, 0 _ _
3. 1007 - 1000= 7
4. 7*2= 14; 1,0 14 _ _
5.
Upvote Commented by
2013-08-12 11:42:25
*Squaring a number over 900's
1. Chose a number over 900's
2. Subtract the number from 1000 to get the difference
3. The first three places will be the number minus the difference
4. The last three places will be the square of the difference (if 4 digits, add the first digit as a carry)
eg:
1. 9
Upvote Commented by
2013-08-08 13:34:16
*Squaring a two digit number over 800's
1. Chose a number over 800's
2. Square the last two digits.
3. 16 times the last two digits + the carry.
4. 64 + the carry
ex:
1. 802
2. _ _ _ 04
3. 16*2= 32; 3204
4. 64 = 643204
One more-
1. 825
2. _ _ _ 25 (6 carried)
3. 16*25= 400 +6= 406; 0625 (4
Upvote Commented by
2013-08-06 17:14:20
*Squaring a two digit number over 700's
1. Chose a number over 700's
2. The first digit of the square is 49. 49 _ _ _
3. The next two digits will be 14 times the last two digits. (suppose it is Y Y). 49 Y Y _ _
4. The last two places will be the square of the last digit. (suppose it is X). 49 Y
Upvote Commented by
2013-08-06 16:02:35
*Squaring a two digit number over 600's
1. Chose a number over 600's
2. The first digit of the square is 36. 36 _ _ _
3. The next two digits will be 12 times the last two digits. (suppose it is Y Y). 36 Y Y _ _
4. The last two places will be the square of the last digit. (suppose it is X). 36 Y
Upvote Commented by
2013-08-05 16:53:40
*Squaring a two digit number over 500's
1. Chose a number over 500's
2. The first digit of the square is 25. 25 _ _ _
3. The next two digits will be 10 times the last two digits. (suppose it is Y Y). 25 Y Y _ _
4. The last two places will be the square of the last digit. (suppose it is X). 16 Y
Upvote Commented by
2013-08-01 14:14:45
*Squaring a two digit number over 400's
1. Chose a number over 400's
2. The first digit of the square is 16. 16 _ _ _
3. The next two digits will be 8 times the last two digits. (suppose it is Y Y). 16 Y Y _ _
4. The last two places will be the square of the last digit. (suppose it is X). 16 Y
Upvote Commented by
2013-07-31 10:52:21
*Squaring a two digit number over 300's
1. Chose a number over 200's
2. The first digit of the square is 9. 9 _ _ _
3. The next two digits will be 6 times the last two digits. (suppose it is Y Y). 9 Y Y _ _
4. The last two places will be the square of the last digit. (suppose it is X). 9 Y Y X
Upvote Commented by
2013-06-24 12:06:05
*Squaring a two digit number over 200's
1. Chose a number over 200's
2. The first digit of the square is 4. 4 _ _ _
3. The next two digits will be 4 times the last two digits. (suppose it is Y Y). 4 Y Y _ _
4. The last two places will be the square of the last digit. (suppose it is X). 4 Y Y X
ex:
Upvote Commented by
2013-06-14 16:33:05
*Squaring a two digit number which ends in 100.
1. Take a two digit number over 100.
2. The last two places will be the square of last two digits (keep any carry) _ _ _ X X
3. The first three places will be the number plus the last two digits plus any carry.
eg:
1. 115
2. 15^15= 225; _ _ _ 25 (
Upvote Commented by
2013-06-13 17:36:22
*Squaring a number in 80's
1. Square the last digit (Keep the carry). _ _ X
2. Multiply the last digit by 16 and add the carry (suppose it is Y). _ Y X
3. The first digit will be 64 plus the carry (from the 2nd step).
eg:
82
1. 2^2= 4; _ _ 4 (0 is carried)
2. 2*16= 32 + 0= 32; _ 2 4 (3 is carrie
Upvote Commented by
2013-06-11 17:33:01
*Squaring a number in 70's
1. Square the last digit (Keep the carry). _ _ X
2. Multiply the last digit by 14 and add the carry (suppose it is Y). _ Y X
3. The first digit will be 49 plus the carry (from the 2nd step).
eg:
73
1. 3^2= 9; _ _ 9 (0 is carried)
2. 3*14= 42 + 0= 42; _ 2 9 (4 is carrie
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